The invasive garden ant Lasius neglectus Van Loon, Boomsma & Andrásfalvy, 1990 is an invasive ant species of the subgenus Lasius. After its discovery (in Budapest, Hungary, in the early 1970s) and formal description it has now been found on more than 100 locations in Europe and western Asia. On all these locations the species has been introduced by man. The region of natural occurrence is not yet known, possibly the Black Sea and Caspian Sea areas. In the Netherlands, Lasius neglectus has not (yet) been found.
On these introduction sites it occurs in disturbed urban, man-made biotopes, such as parks, gardens, along roads an boulevards, nesting in the ground. Sometimes it enters houses. Workers forage in remarkably large numbers on aphids in trees.
The species is extremely polygynous, i.e. the nests contain many reproductive queens (unique among European Lasius). Nuptial flights seem to be non-existent. Mating mainly occurs on or in the nests and fertilized queens remain in or re-enter into their nests. Dispersal occurs by colony budding by a group of workers with some queens. Dispersal over large distances is only possible by human transport, most probably via transport of (potted) plants, soil or other material.
Loon, A.J. van